Decay of correlations in 2D quantum systems with continuous symmetry
arXiv:1612.02478 · doi:10.1007/s00023-017-0571-4
Abstract
We study a large class of models of two-dimensional quantum lattice systems with continuous symmetries, and we prove a general McBryan-Spencer-Koma-Tasaki theorem concerning algebraic decay of correlations. We present applications of our main result to the Heisenberg-, Hubbard-, and t-J models, and to certain models of random loops.
14 pages, 1 figure